Document:

CONSULTING AGREEMENT

 EXHIBIT 10.18 
 CONSULTING AGREEMENT 
 THIS CONSULTING AGREEMENT (this “Agreement”), dated as
of February 28, 2006 (the “Effective Date”), is entered into by and between Bronco Drilling Company, Inc, a Delaware corporation (the “Company”), and Michael O. Thompson
(“Consultant”). 
 RECITALS 
 WHEREAS, the Company desires to retain Consultant to provide the services set forth below, and Consultant desires to be so retained; and 
 WHEREAS, the Company shall grant Consultant, as a consultant of the Company, access to certain confidential information with respect to the Company and its affiliates; 
 STATEMENT OF AGREEMENT 
 NOW,
THEREFORE, for and in consideration of the mutual covenants and agreements contained in this Agreement and for other good and valuable consideration the receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agree as
follows: 
 1. Retention. The Company hereby retains Consultant, and Consultant hereby accepts such retention, upon the terms and
conditions set forth in this Agreement. 
 2. Duties. Subject to the terms and conditions of this Agreement, Consultant shall provide
such services to the Company as may be requested from time to time by the Chairman or the Chief Executive Officer (the “Services”). Consultant shall dedicate that portion of Consultant’s business time as is necessary to
provide the Services. 
 3. Compensation. As compensation for the Services, Consultant shall be entitled to receive the following:

 (a) Consulting Fee. During the Term, Consultant’s options to purchase common stock of the Company
(“Options”) granted to Consultant pursuant to the Stock Option Agreement, dated August 19, 2005, by and between the Company and the Consultant (the “Stock Option Agreement”) shall continue to vest
in accordance with the terms set forth in the Stock Option Agreement. 
 (b) Sole Compensation. The compensation set forth in
Section 3(a) will be the sole compensation payable to Consultant for any consulting services provided to the Company and no additional compensation or fee will be payable by the Company to Consultant by reason of any benefit gained by
the Company, directly or indirectly, through Consultant’s consulting efforts under this Agreement, nor shall the Company be liable in any way for any additional compensation or fee for consulting services provided by Consultant unless the
Company shall have expressly agreed upon such additional compensation or fee in writing. 

 4. Term and Termination. 
 (a) Term. The term for providing consulting Services under this Agreement shall commence on the Effective Date and shall terminate on
August 19, 2008, unless earlier terminated pursuant to Section 4(b) below (the “Term”). 
 (b)
Termination. This Agreement, and the consulting relationship created hereby, shall terminate upon the occurrence of any of the following events: 
  

	 	(i)	The expiration of the Term set forth in Section 4(a) above; 

  

	 	(ii)	Termination by either party immediately by prior written notice if the other party breaches any material provision of this Agreement and fails to cure such breach within thirty
(30) days of written notice describing such breach; 

  

	 	(iii)	The death of Consultant; 

  

	 	(iv)	The Disability of Consultant; or 

  

	 	(v)	Termination of Consultant by the Company for Cause. 

 (c)
Definition. For purposes of Section 4(b) above, the terms “Disability” and “Cause” shall have the meaning set forth in the Company’s 2005 Stock Incentive Plan. 
 (d) Effect of Termination. The effect on Consultant’s Options of any termination of Consultant’s engagement pursuant to
Section 4(b) prior to the completion of the Term shall be as set forth in Section 4 of the Stock Option Agreement. The Company shall have no further obligations to Consultant upon any termination of this Agreement pursuant to
Section 4(b). 
 5. Independent Contractor Status. The Company and Consultant agree that Consultant is an independent
contractor under this Agreement and shall in no way be considered to be an employee of the Company and, accordingly, Consultant shall not be entitled to any benefits, coverages or privileges made available to employees of the Company. Consultant
shall only consult and render advice to the Company and shall not undertake to commit the Company to any course of action in relation to third persons, except as requested by the Company. During the term of his retention, Consultant shall be
compensated on a 1099 basis and accordingly Consultant shall be liable for any and all worker’s compensation payments and federal, state and local employment, sales, use, excise and other taxes arising out of his performance of his obligations
pursuant to this Agreement and shall furnish evidence of such compliance or an applicable waiver of requirements to the Company upon request. 
 6. Miscellaneous. 
 (a) Notices. All notices, requests, demands, payments and other communications made pursuant to
this Agreement shall be in writing and shall be deemed properly given if hand delivered, if sent by mail or overnight courier service, or if transmitted by 
  

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 telecopy or similar service to the parties hereto either at the address set forth below for such person or at such other
address as such person may from time to time specify by written notice pursuant to this Section 6(a). Any such notice shall be deemed to have been delivered on the date of delivery if hand delivered, upon confirmation if transmitted by
telecopy or similar service, or as of three days after depositing such notice with the United States postal service if sent by mail or if delivered to an overnight courier service and shall be delivered with postage prepaid, return receipt
requested, and properly addressed as follows: 
  

							
				
		 	If to the Company:	 	 Bronco Drilling Company, Inc.
 14313 North May Avenue,
Suite 100 Oklahoma City, Oklahoma 73134 Facsimile: (405) 848-881
 6 Attention: Mark Dubberstein
	  	
				
		 	If to Consultant:	 	 Michael O. Thompson
 12117 Quail Creek Rd.
 Oklahoma City, Oklahoma 73120
	  	

 (b) Binding Agreement. This Agreement and the rights and obligations hereunder shall be
binding upon and inure to the benefit of the Company and Consultant and their respective heirs, personal representatives, successors and assigns. The rights, duties and obligations of Consultant under this Agreement are personal to consultant and no
such right, duty or obligation may be assigned by Consultant to any other person. The Company may not assign its rights, duties or obligations under this Agreement without the prior written consent of the Consultant. 
 (c) Entire Agreement. This Agreement and the agreements incorporated and contemplated herein constitute the entire agreement between the Company
and Consultant and supersede any and all prior or contemporaneous agreements between the parties, either written or oral, with respect to the matters contemplated herein. This Agreement may be modified or amended only by an instrument in writing and
signed by all the parties hereto. Any waiver of the terms and conditions of this Agreement must be in writing and signed by all the parties hereto and any such waiver shall not be construed as a waiver of any other terms and conditions of this
Agreement. 
 (d) Severability. If any one or more of the terms, provisions, covenants or restrictions of this Agreement shall be
determined by a court of competent jurisdiction to be invalid, void or unenforceable, the remainder of the terms, provisions, covenants and restrictions shall remain in full force and effect, and the invalid, void or unenforceable provisions shall
be deemed severable. Moreover, if any one or more of the provisions contained in this Agreement shall for any reason be held to be excessively broad as to duration, geographical scope, persons, activities, or subjects, it shall be reformed by
limiting and reducing it to the minimum extent necessary, so as to be enforceable to the extent compatible with the applicable law as it shall then appear. 
  

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 (e) Counterparts. This Agreement may be executed in several counterparts and each such counterpart
shall be deemed an original copy of this Agreement when so executed and such counterparts shall, when taken together, constitute and be one and the same instrument. 
 (f) Further Assurances. Each party hereby agrees to perform any further acts and to execute and deliver any documents which may be reasonably necessary to carry out the provisions of this Agreement. 

(g) Captions. The captions and headings in this Agreement are made for purposes of convenience and general reference only and shall not be
construed to define, limit, or otherwise affect any of the terms or provisions of this Agreement. 
 (h) Governing Law. This Agreement
shall be governed by and construed in accordance with the laws of the State of Oklahoma and applied without giving effect to any conflicts of laws principles. 
 [SIGNATURE PAGE FOLLOWS] 
  

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 IN WITNESS WHEREOF, the parties executed this Agreement on the Effective Date. 
  

			
	COMPANY:
	
	 BRONCO DRILLING COMPANY, INC.

		
	By:	 	 /s/ D. Frank Harrison    

		
	Name:	 	 D. Frank Harrison

		
	Title:	 	 CEO

		
		 	
	 CONSULTANT:

	
	/s/ Michael O. Thompson
	 Michael O. ThompsonTime-Sharing Agreement

 EXHIBIT 10.16 
  
 TIME-SHARING AGREEMENT 
  
 This Time-Sharing Agreement (the “Agreement”) is made and entered into effective as of September 1, 2005 (the “Effective Date”), by
and between JBS Consulting, LLC, a Delaware limited liability company (“Lessor”) and Foxhollow Technologies, Inc., a Delaware corporation (“Lessee”), and is made and entered into with reference to the following facts and
objectives: 
  
 RECITALS 
  
 A. WHEREAS, Lessor is the owner of that certain aircraft identified as a 2001
Dassault Falcon 900, Serial Number 189, U.S. Registration Number N144FH, with its Honeywell Model TFE-731-SER engines (Serial Numbers P-101388, P101387, and P-101386) and auxiliary power unit, avionics, equipment, components, accessories,
instruments and other items installed in or attached to the airframe, the engines or the auxiliary power unit, together with all spare parts, manuals and log books carried on board and including any replacement part(s) or engine(s) which may be
installed on the Aircraft from time to time, and all logs, manuals and other records relating to such Aircraft (collectively, the “Aircraft”); and 
  
 B. WHEREAS, Lessor has heretofore engaged a fully qualified flight crew to operate the Aircraft; and 
  
 C. WHEREAS, Lessee desires to lease said Aircraft and flight crew from Lessor
on a time-sharing basis, as defined in Section 91.501(c)(1) of the Federal Aviation Regulations (“FAR”). 
  
 NOW, THEREFORE, for and in consideration of the mutual promises, covenants and conditions herein set forth, Lessor and Lessee agree as follows:

  
 1. Lease of Aircraft; Term of Lease. Lessor
agrees to lease the Aircraft to Lessee pursuant to the provisions of FAR 91.501(c)(1) and to provide a fully qualified flight crew for all operations for the period commencing on the Effective Date of this Agreement and terminating on the date that
is thirty (30) days subsequent to date on which either party hereto gives the other written notice of its election to terminate the Agreement. 
  
 2. Lessee’s Payment Obligations. Lessee shall pay Lessor for each flight conducted under this Agreement the aggregate incremental cost
of each specific flight. Such cost shall in no event exceed the sum of the following expenses authorized by FAR Part 91.501(d); 
  

	 	A.	Fuel, oil, lubricants, and other additives; 

  

	 	B.	Travel expenses of the crew, including food, lodging and ground transportation; 

  

	 	C.	Hangar and tie down costs away from the Aircraft’s base of operation; 

  

	 	D.	Insurance obtained for the specific flight; 

  

	 	E.	Landing fees, airport taxes and similar assessments including, but not limited to IRC Section 4261 and related excise taxes; 

	 	F.	Customs, foreign permit, and similar fees directly related to the flight; 

  

	 	G.	In-flight food and beverages; 

  

	 	H.	Passenger ground transportation; 

  

	 	I.	Flight planning and weather contract services; and 

  

	 	J.	An additional charge equal to 100% of the expenses listed in subparagraph (A) of this paragraph. 

  
 3. Invoicing for Flights. Lessor will pay all expenses related to the operation of the Aircraft when incurred,
and will provide, or contract with third parties to provide, an invoice to Lessee for the incremental cost of each specific flight on the last day of the month in which any flight or flights for the account of Lessee occur. Lessee shall pay Lessor
for said expenses within 30 days of receipt of the invoice therefor. 
  
 4. Request for Flights by Lessee. Lessee will provide Lessor with requests for flight time and proposed flight schedules as far in advance of any given flight as possible. Requests for flight time shall be in a form, whether
written or oral, mutually convenient to, and agreed upon by the parties. In addition to the proposed schedules and flight times, Lessee shall provide at least the following information for each proposed flight at some time prior to the scheduled
departure time, as required by the Lessor or Lessor’s flight crew: 
  

	 	A.	proposed departure point; 

  

	 	B.	destination; 

  

	 	C.	date and time of flight; 

  

	 	D.	the number of anticipated passengers; 

  

	 	E.	the nature and extent of luggage and/or cargo to be carried; 

  

	 	F.	the date and time of return flight, if any; and 

  

	 	G.	any other information concerning the proposed flight that may be pertinent or required by Lessor or Lessor’s flight crew. 

  
 5. Scheduling Flights. Lessor shall have final authority over
the scheduling of the Aircraft, provided, however, that Lessor will use its best efforts to accommodate Lessee’s needs and to avoid conflicts in scheduling. 
  
 6. Maintenance of Aircraft. Lessor shall be solely responsible for performing or arranging for the performance
of all scheduled and unscheduled maintenance or preventive maintenance and shall cause to be performed all required or necessary inspections on the Aircraft, and shall take all such requirements into account in scheduling the Aircraft. No period of
maintenance, preventative maintenance or inspection shall be delayed or postponed for the purpose of scheduling the Aircraft, unless said maintenance or inspection can be safely conducted at a later time in compliance with all applicable laws and
regulations, and within the sound discretion of the pilot in command. The pilot in command shall have final and complete authority to cancel any flight for any reason or condition which in his or her judgment would compromise the safety of the
flight. 
  

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 7. Flight Crew. Lessor shall employ or contract with others to employ, pay for and provide
to Lessee, a qualified flight crew for each flight undertaken under this Agreement. 
  
 8. Safety of Flights. In accordance with applicable FAR, the qualified flight crew provided by Lessor will exercise all of its duties and responsibilities in regard to the safety of each flight conducted
hereunder. Lessee specifically agrees that the flight crew, in its sole discretion, may terminate any flight, refuse to commence any flight, or take other action which in the considered judgment of the pilot in command is necessitated by
considerations of safety. No such action of the pilot in command shall create or support any liability for loss, injury, damage or delay to Lessee or any other person. The parties further agree that Lessor shall not be liable for delay or failure to
furnish the Aircraft and crew pursuant to this Agreement when such failure is caused by government regulation or authority, mechanical difficulty, war, civil commotion, strikes or labor disputes, weather conditions, or acts of God. 
  
 9. Additional Insurance. Lessor will provide such additional
insurance coverage as Lessee shall request or require, provided, however, that the cost of such additional insurance, if any, shall be borne by Lessee as set forth in paragraph 2(d) hereof. 
  
 10. Representations of Lessee. Lessee warrants that during the
term of this Agreement: 
  
 A. It shall use the Aircraft for and
on account of his own business only, and will not use the Aircraft for the purpose of providing transportation of passengers or cargo in air commerce for compensation or hire; 
  
 B. It shall refrain from incurring any mechanics or other lien in connection with inspection, preventative maintenance,
maintenance or storage of the Aircraft, whether permissible or impermissible under this Agreement, nor shall there be any attempt by any party hereto to convey, mortgage, assign, lease or any way alienate the Aircraft or create any kind of lien or
security interest involving the Aircraft or do anything or take any action that might mature into such a lien; 
  
 C. It shall abide by and conform to all such laws, governmental and airport orders, rules and regulations, as shall from time to time be in effect
relating in any way to the operation and use of the Aircraft by a time-sharing Lessee; 
  
 D. It shall not violate, and shall not permit any of his employees, agents, or guests to violate, any applicable law, regulation or rule of the United States, and state, territory of local authority, or any foreign
government or subdivision thereof, and shall not bring or cause to be brought or carried on board the Aircraft, or permit any employee, agent or guest to bring or cause to be brought or carried on board the Aircraft, any contraband or unlawful
articles or substance in any jurisdiction into or over which the Aircraft is to operate on its behalf. 
  
 E. It shall, and it shall cause its employees, agents and guests to, comply with all lawful instructions and procedures of Lessor and its agents and
employees regarding the Aircraft, its operation or flight safety. 
  
 F. That its discretion in determining the origin and destination of flights under this Agreement shall at all times be subject to the following: 
  

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 (i) such origin and destination, and the routes to reach such origin and destination,
are not within or over (a) an area of hostilities, (b) an area excluded from coverage under the insurance policies maintained by Lessor with respect to the Aircraft, or (c) a country or jurisdiction for which exports or transactions
are subject to specific restrictions under any United States export or other law or United Nations Security Council Directive, including without limitation, the Trading With the Enemy Act, 50 U.S.C. App. Section 1 et seq. and International
Emergency Economic Powers Act, 50 U.S.C. App. Sections 1700 et seq. and the Export Administration Act, 50 U.S.C. Sections 2401 et. seq.; 
  
 (ii) any flights proposed or conducted by it shall not cause (a) the Aircraft or any part thereof to be used predominately outside
the United States within the meaning of the Section 168(g)(1)(A) of the Internal Revenue Code of 1986, as amended (the “Code”), and/or fail to be operated to and from the United States within the meaning of Section 168(g)(4)(A)
of the Code; or (b) any item of income, gain, deduction, loss or credit with respect to the transactions contemplated by this Agreement to be treated as derived from, or allocable to, sources without the United States within the meaning of
Section 862 of the Code; 
  
 (iii) any
proposed flight shall not require the flight crew to exceed any flight or duty time limitations that Lessor imposes on its flight crews; and 
  
 (iv) the safety of flight shall not be jeopardized. 
  
 11. Aircraft Base. For purposes of this Agreement, the current base of operation of the Aircraft shall be San
Jose, California, or such other locations as are acceptable to the parties hereto from time to time. 
  
 12. No Assignment. Neither this Agreement nor any party’s interest herein shall be assignable to any other party whatsoever. This
Agreement shall inure to the benefit of and be binding upon the parties hereto, their heirs, representatives and successors. 
  
 13. TRUTH IN LEASING STATEMENT 
  
 LESSEE HAS REVIEWED THE AIRCRAFT’S MAINTANANCE RECORDS AND OPERATION LOGS AND HAS FOUND THAT DURING THE PERIOD BETWEEN MANUFACTURE OF THE AIRCRAFT
AND THE DATE OF THIS LEASE, THE AIRCRAFT, A DASSAULT FALCON 900, MANUFACTURER’S SERIAL NO. 189, CURRENTLY REGISTERED WITH THE FEDERAL AVIATION ADMINISTRATION AS N144FH, HAS BEEN MAINTAINED AND INSPECTED UNDER FAR PART 91. 
  
 THE AIRCRAFT WILL BE MAINTAINED AND INSPECTED UNDER FAR PART 91 FOR
OPERATIONS TO BE CONDUCTED UNDER THIS LEASE. DURING THE DURATION OF THIS LEASE, JBS CONSULTING, LLC, [ADDRESS OMITTED] IS CONSIDERED RESPONSIBLE FOR OPERATIONAL CONTROL OF THE AIRCRAFT UNDER THIS LEASE. 
  
 AN EXPLANATION OF FACTORS BEARING ON OPERATIONAL CONTROL AND PERTINENT
FEDERAL AVIATION REGULATIONS CAN BE OBTAINED FROM THE NEAREST FAA FLIGHT STANDARDS DISTRICT OFFICE. 
  

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 THE “INSTRUCTIONS FOR COMPLIANCE WITH TRUTH IN LEASING REQUIREMENTS” ATTACHED HERETO ARE
INCORPORATED HEREIN BY REFERENCE. 
  
 I, THE UNDERSIGNED, JOHN B.
SIMPSON, AS MANAGER OF JBS CONSULTING, LLC, [ADDRESS OMITTED] CERTIFIES THAT IT IS RESPONSIBLE FOR OPERATIONAL CONTROL OF THE AIRCRAFT AND THAT IT UNDERSTANDS ITS RESPONSIBILITIES FOR COMPLIANCE WITH APPLICABLE FEDERAL AVIATION REGULATIONS.

  
 IN WITNESS WHEREOF, the parties have executed this Agreement.

  
 LESSOR: 
  
 JBS CONSULTING, LLC 
 a Delaware limited liability company, 
  

							
	 By:
	 	/s/    John B. Simpson	    	 	 	 March 6, 2006                    4:20
pm

	 	 	
	    	 	 	

	 	 	        John B. Simpson	    	 	 	Date and Time of Execution
	 	 	        Manager	    	 	 	 

  
 LESSEE: 
  
 FOXHOLLOW TECHNOLOGIES,
INC., 
  

							
	 By:
	 	/s/    Matthew B. Ferguson	    	 	 	 March 6, 2006                    4:20
pm

	 	 	
	    	 	 	

	 	 	Its Chief Financial Officer	    	 	 	Date and Time of Execution

  

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 INSTRUCTIONS FOR COMPLIANCE WITH “TRUTH IN LEASING” 
 REQUIREMENTS 
  
 1. Mail a copy of the lease to the following address via certified mail, return receipt requested, immediately upon execution of the lease (14 C.F.R.
91.23 requires that the copy be sent within twenty-four hours after it is signed): 
  
 Federal Aviation Administration 
 Aircraft Registration Branch 
 ATTN: Technical Section 
 P. O. Box 25724

 Oklahoma City, Oklahoma 73125 
  
 2. Telephone the nearest Flight Standards District Office at least forty-eight hours prior to the first flight under this lease. 
  
 3. Carry a copy of the lease in the aircraft at all times. 
  

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