公开(公告)号：WO1994010420A1

公开(公告)日：1994-05-11

申请号：PCT/US1993007978

申请日：1993-08-24

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  ODORISIO, Vincent, G.

IPC: E21B07/08

CPC classification number: E21B23/02 ,  E21B7/061 ,  E21B21/00 ,  E21B23/01 ,  E21B33/129 ,  E21B33/134

Abstract: Whipstock/packer assembly equipment and procedures to retrieve and reuse a whipstock assembly during drilling operations for horizontal drainhole application. The anchor is seated in a retrievable packer and has a bore communicating with the fluid path in the whipstock and ports through the anchor body to the bore. Fluid pumped through the ports after a drilling operation flush cuttings from the annulus between the anchor and the associated packer and carry them to the surface, thereby preventing the cuttings from hampering removal of the anchor. The same fluid path can be used to introduce a gel to the annulus prior to drilling to prevent cuttings from collecting on the packer. Introduction of fluid after the drilling operation may be employed to remove the gel and collected cuttings or the whipstock/packer assembly may be withdrawn without flushing.

Abstract translation: 制造商/封隔器组装设备和程序，用于在水平排水孔应用的钻井操作期间检索和重新使用造斜器组件。 锚固件位于可回收的封隔器中，并且具有与造斜器中的流体路径连通的孔，并且通过锚固体将孔口连通至孔。 在钻孔操作之后，通过孔口泵送的流体从锚固件和相关的封隔器之间的环空中冲洗并将其运送到表面，从而防止切屑阻碍锚的移除。 可以使用相同的流体路径在钻孔之前将凝胶引入环空，以防止切屑收集在封隔器上。 可以采用在钻孔操作之后引入流体以除去凝胶并收集切屑或造斜器/打包器组件可以抽出而不进行冲洗。

公开(公告)号：WO1994009242A1

公开(公告)日：1994-04-28

申请号：PCT/US1993007983

申请日：1993-08-24

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  SNIDER, Philip, M. ,  DIETRICH, Michael, J.

IPC: E21B03/00

CPC classification number: E21B23/00 ,  E21B17/021 ,  E21B31/00

Abstract: A wellbore operation in which a downhole tool is given rotary motion without rotating the tubing string to which it is attached. A "Yankee screwdriver" type of connector is used to connect a downhole tool to a tubing string so that compressive forces acting on the connector as a result of relative linear movement between the connector and the tool cause the tool to rotate. A number of various types of downhole operations are possible, such as rotating a tool away from an obstruction and retrieving the upper section of a lost tubing string.

Abstract translation: 井眼操作，其中井下工具被旋转运动，而不旋转其所连接的油管柱。 使用“扬克式螺丝刀”型连接器将井下工具连接到油管柱，使得由于连接器和工具之间的相对线性运动而作用在连接器上的压缩力导致工具旋转。 许多各种类型的井下操作是可能的，例如使工具远离障碍物旋转并且检索丢失的油管柱的上部。

公开(公告)号：WO1994004256A1

公开(公告)日：1994-03-03

申请号：PCT/US1993004895

申请日：1993-05-25

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  SOUTHWELL, George, P.

IPC: B01F05/06

CPC classification number: B01F5/0682 ,  B01F5/0406 ,  B01F5/0693 ,  Y10S261/26 ,  Y10S366/604

Abstract: A foam generator is provided for in-line installation within a surface tubing network. The generator has a foaming chamber (10) with a plurality of permeable screens (52) positioned in series along a continuous flowpath through the foaming chamber. The screens are separated from one another by spacers (76, 78) that define the radial boundaries of the flowpath. According to one embodiment, the screens and spacers are mounted in a cartridge that fits into the foaming chamber to maintain proper screen alignment and facilitate removal of the screens from the chamber for maintenance. In an alternate embodiment, the screens and spacers are mounted directly in the chamber. In both embodiments, the screens are aligned orthogonal to the flowpath enabling the generator to produce a properly textured foam from shear-sensitive fluids with relatively little shear degradation. The foaming chamber exhibits a substantially uniform incremental pressure drop along any segment of its length and a minimum total pressure drop across its entirety as a function of the number of screens in the foaming chamber, the size and pattern of the openings through the screens, and the cross-sectional area of the flowpath delineated by the spacers.

Abstract translation: 提供泡沫发生器用于在表面管网内进行在线安装。 发生器具有发泡室（10），其具有多个可渗透筛网（52），其沿着连续的流动路径定位成串联通过发泡室。 屏幕通过限定流路的径向边界的间隔物（76,78）彼此分开。 根据一个实施例，屏幕和间隔件安装在装配到发泡室中的盒中以保持适当的屏幕对准，并且便于从室中移除屏幕用于维护。 在替代实施例中，屏幕和间隔件直接安装在腔室中。 在两个实施例中，筛网与流路正交对准，使得发生器能够产生具有相对较小剪切降解的剪切敏感流体的适当纹理的泡沫。 发泡室沿着其长度的任何部分呈现基本上均匀的增加的压降，并且其整体上的最小总压降是发泡室中的筛网数量，通过筛网的开口的尺寸和图案的函数，以及 由间隔物描绘的流路的横截面积。

公开(公告)号：WO1992010639A1

公开(公告)日：1992-06-25

申请号：PCT/US1991005784

申请日：1991-08-15

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  SCHROEDER, Donald, E., Jr. ,  BUTLER, Brian, A.

IPC: E21B43/04

CPC classification number: E21B34/08 ,  E21B43/045

Abstract: Method and means for preventing fluidization or mobilization of a gravel pack in a fluid producing well as a result of increased fluid pressure caused by a well shut-in or other pressure surge. A pressure relief valve (36) in the form of a check valve is provided in a tubing string (18) below a packer (20) surrounding the string and above the top of the gravel pack (28). The check valve is held in closed position by a biasing force, such as a spring, which is less than the pressure which will cause mobilization or fluidization of the gravel pack. A pressure surge such as a well shut-in or flow rate decrease increases tubing pressure which causes the check valve to open, thereby relieving the pressure in the gravel pack to a point below the critical level.

公开(公告)号：WO1992007881A1

公开(公告)日：1992-05-14

申请号：PCT/US1991004734

申请日：1991-07-03

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  TACKETT, James, E., Jr. ,  LUETZELSCHWAB, Wayne, E.

IPC: C08F08/12

CPC classification number: C08F8/12

Abstract: Aqueous solutions of partially hydrolyzed polyacrylamide are storable by adjusting and maintaining solution pH from about 3.5 to about 6.8 prior to storage. Storage at a pH above 6.8 or below 3.5 results in hydrolysis. The desired solution pH is achieved by addition of appropriate mineral acids or bases or by the addition of buffer systems with pKa values of about 3.5 to about 6.8.

Abstract translation: 在储存之前，部分水解的聚丙烯酰胺的水溶液可以通过调节和保持溶液pH约3.5至约6.8来储存。 高于6.8或低于3.5的pH储存会导致水解。 所需的溶液pH通过加入适当的无机酸或碱或通过加入具有约3.5至约6.8的pKa值的缓冲体系来实现。

公开(公告)号：WO1989002024A1

公开(公告)日：1989-03-09

申请号：PCT/US1988001984

申请日：1988-06-10

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  JOHNSON, Irvin, D.

IPC: E21B27/00

CPC classification number: E21B27/02

Abstract: An oil well tool (10) for in situ release of treatment fluid (18) into an oil well is disclosed. A tubular body (28) is insertable into an oil well casing (12), which tubular body carries a bladder (20) containing treatment fluid. The body is closed at a lower end and has at an upper end a fishing neck connector (32). A weight (34) slideable within the tubular body compresses the treatment fluid within the bladder and forces the treatment fluid under a constant pressure through a fluid passageway (38). The size and length of the fluid passageway, combined with the pressure applied and viscosity of the treatment fluid, dictate the flow rate at which the treatment fluid is deposited into the oil well. The treatment fluid mixes with other fluids being circulated through the well formation. The primary purpose for the treatment fluid is to inhibit scale buildup and corrosion. This is accomplished by slow release of the treatment fluid over an extended period of time.

公开(公告)号：WO1987001456A1

公开(公告)日：1987-03-12

申请号：PCT/US1986001182

申请日：1986-06-02

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  CHRISTIANSEN, Richard, L. ,  KIM, Hiemi

IPC: G01N33/28

CPC classification number: G01N33/2823

Abstract: An apparatus and method for determining the minimum miscibility pressure of a gas in a liquid comprises injecting a gas bubble into a transparent tube containing the liquid at a fixed predetermined pressure and temperature and observing the bubble behavior as it passes through the liquid in the tube. Thereafter, the pressure is increased and the procedure is repeated until the lowest pressure at which a bubble exhibits characteristic miscibility behavior in the liquid is determined, which is defined as the minimum miscibility pressure.

公开(公告)号：WO1984002137A1

公开(公告)日：1984-06-07

申请号：PCT/US1983001234

申请日：1983-08-11

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  LUETZELSCHWAB, Wayne, E.

IPC: C08J03/02

CPC classification number: B01F3/088 ,  B01F5/102 ,  B01F2003/0896 ,  C08J3/03 ,  C09K8/588 ,  Y10T137/0318

Abstract: A method and apparatus for the continuous processing of polymers and, more particularly, a method and apparatus for the continuous dilution of solutions of long-chain polymers by successive or multiple recycling without degrading of the polymers.

公开(公告)号：WO1998013577A1

公开(公告)日：1998-04-02

申请号：PCT/US1997012731

申请日：1997-07-22

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  SYDANSK, Robert, D.

IPC: E21B33/138

CPC classification number: C09K8/512 ,  Y10S507/903

Abstract: A process and composition are provided for permeability reduction in a hydrocarbon-bearing formation to improve hydrocarbon recovery therefrom. The process includes placement of a cross-linked polymer gel in the treatment region preceded by surface preparation of a gelation solution which is the gel precursor. The gelation solution contains a cross-linkable polymer, a chromium(III)/carboxylate complex cross-linking agent, an inorganic fluoride salt stabilizing agent and an aqueous solvent containing hard salts. The gel is placed in the treatment region by injecting the gelation solution into a well bore in fluid communication with the formation, displacing the gelation solution into the desired treatment region and gelling the solution to completion forming the permeability-reducing gel in situ. The inorganic fluoride salt stabilizing agent promotes the long-term stability of the gel in the treatment region, particularly at high temperatures.

Abstract translation: 提供了一种方法和组合物，用于含烃地层中的渗透率降低以改善烃的回收。 该方法包括将交联聚合物凝胶放置在处理区域中，之后是凝胶化溶液的表面制备，其是凝胶前体。 凝胶溶液含有可交联聚合物，铬（III）/羧酸盐络合物交联剂，无机氟化物盐稳定剂和含有硬盐的水溶剂。 将凝胶放置在处理区域中，将凝胶化溶液注入到与地层流体连通的井眼中，将凝胶化溶液置换成所需的处理区域，并使溶液凝胶化，直至形成渗透性降低凝胶。 无机氟化物盐稳定剂促进凝胶在处理区域的长期稳定性，特别是在高温下。

公开(公告)号：WO1997021022A1

公开(公告)日：1997-06-12

申请号：PCT/US1996017474

申请日：1996-10-28

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  SYDANSK, Robert, D.

IPC: E21B43/26

CPC classification number: C09K8/703

Abstract: A process for fracturing a subterranean formation below an earthen surface in fluid communication with a wellbore. A foamed fracturing fluid comprising an aqueous solvent, a water-soluble synthetic polymer, a surfactant, and a gas is premixed at the surface. The aqueous solvent may be a fresh water or a brine. The fracturing fluid may additionally comprise a proppant, fluid loss additive, and/or a foam breaker. After the fluid is mixed and foamed, it is injected into the formation via the wellbore at a pressure sufficient to induce at least one hydraulic fracture in the formation.

Abstract translation: 一种在与井筒流体连通的地层下压裂地层的方法。 包含水性溶剂，水溶性合成聚合物，表面活性剂和气体的发泡压裂液在表面预混合。 水性溶剂可以是淡水或盐水。 压裂液可另外包含支撑剂，流体损失添加剂和/或泡沫破碎剂。 在流体混合和发泡之后，通过井筒以足以在地层中引起至少一个水力裂缝的压力将其注入到地层中。